/**
 * PO18小说下载站 - MD3简约风格
 */

/* ===== CSS变量 - MD3色彩系统 ===== */
:root {
    /* 主色调 - 粉色系 */
    --md-primary: #D81B60;
    --md-on-primary: #FFFFFF;
    --md-primary-container: #FFD9E3;
    --md-on-primary-container: #3E001F;
    
    /* 次级色 */
    --md-secondary: #6E5B5F;
    --md-on-secondary: #FFFFFF;
    --md-secondary-container: #F7DDE2;
    --md-on-secondary-container: #27161C;
    
    /* 表面颜色 */
    --md-surface: #FFFBFF;
    --md-surface-dim: #E4D7D9;
    --md-surface-variant: #F3DEE3;
    --md-on-surface: #201A1B;
    --md-on-surface-variant: #514347;
    --md-outline: #837377;
    --md-outline-variant: #D5C2C6;
    
    /* 背景和容器 */
    --md-background: #FFF8F9;
    --md-surface-container-lowest: #FFFFFF;
    --md-surface-container-low: #FEF0F2;
    --md-surface-container: #F8EAEC;
    --md-surface-container-high: #F2E4E7;
    --md-surface-container-highest: #ECDEE1;
    
    /* 语义色 */
    --md-error: #BA1A1A;
    --md-on-error: #FFFFFF;
    --md-success: #146B3A;
    --md-warning: #F57C00;
    
    /* 圆角 */
    --md-radius-xs: 4px;
    --md-radius-sm: 8px;
    --md-radius-md: 12px;
    --md-radius-lg: 16px;
    --md-radius-xl: 28px;
    --md-radius-full: 9999px;
    
    /* 阴影 */
    --md-elevation-1: 0 1px 2px rgba(0,0,0,0.1), 0 1px 3px rgba(0,0,0,0.08);
    --md-elevation-2: 0 2px 6px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.08);
    --md-elevation-3: 0 4px 8px rgba(0,0,0,0.12), 0 2px 4px rgba(0,0,0,0.08);
    
    /* 过渡 */
    --md-transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --md-transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== 基础重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--md-background);
    color: var(--md-on-surface);
    line-height: 1.6;
    min-height: 100vh;
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    -webkit-tap-highlight-color: transparent; /* 移除点击高亮 */
    -webkit-touch-callout: none; /* 禁用长按菜单 */
    touch-action: manipulation; /* 优化触摸响应 */
}

a {
    color: var(--md-primary);
    text-decoration: none;
    transition: var(--md-transition);
    -webkit-tap-highlight-color: transparent;
}

a:hover {
    opacity: 0.8;
}

/* 移动端按钮触摸优化 */
button, .btn, .btn-sm {
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    cursor: pointer;
}

/* 移动端输入框优化 */
input, select, textarea {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    font-size: 16px; /* 防止iOS自动缩放 */
}

/* ===== 头部导航 - MD3风格 ===== */
.header {
    background: var(--md-surface-container-lowest);
    color: var(--md-on-surface);
    padding: 8px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    box-shadow: var(--md-elevation-1);
    position: sticky;
    top: 0;
    z-index: 100;
    flex-wrap: wrap;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 24px;
    color: var(--md-primary);
}

.logo-text {
    font-size: 18px;
    font-weight: 600;
    color: var(--md-primary);
    letter-spacing: -0.3px;
}

.nav {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.nav-link {
    color: var(--md-on-surface-variant);
    padding: 8px 12px;
    border-radius: var(--md-radius-xl);
    transition: var(--md-transition);
    font-size: 13px;
    font-weight: 500;
    white-space: nowrap;
}

.nav-link:hover {
    background: var(--md-surface-container-high);
    color: var(--md-on-surface);
}

.nav-link.active {
    background: var(--md-secondary-container);
    color: var(--md-on-secondary-container);
}

.user-area, .user-info {
    display: flex;
    align-items: center;
    gap: 8px;
}

#username-display {
    font-weight: 500;
    color: var(--md-primary);
    padding: 6px 12px;
    background: var(--md-primary-container);
    border-radius: var(--md-radius-xl);
    font-size: 14px;
}

/* ===== 按钮样式 - MD3 ===== */
.btn {
    padding: 10px 24px;
    border: none;
    border-radius: var(--md-radius-full);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: var(--md-transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    letter-spacing: 0.1px;
    white-space: nowrap;
    user-select: none;
}

.btn-primary {
    background: var(--md-primary);
    color: var(--md-on-primary);
}

.btn-primary:hover {
    box-shadow: var(--md-elevation-2);
    filter: brightness(1.05);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--md-outline);
    color: var(--md-primary);
}

.btn-outline:hover {
    background: var(--md-surface-container);
}

.btn-tonal {
    background: var(--md-secondary-container);
    color: var(--md-on-secondary-container);
}

.btn-tonal:hover {
    box-shadow: var(--md-elevation-1);
}

.btn-sm {
    padding: 6px 16px;
    font-size: 13px;
}

.btn-block {
    width: 100%;
}

.btn:disabled {
    opacity: 0.38;
    cursor: not-allowed;
    box-shadow: none !important;
}

.button-group {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

/* ===== 主内容区 ===== */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
    min-height: calc(100vh - 120px);
}

.page {
    display: none;
}

.page.active {
    display: block;
}

/* 标签页样式 */
.tab-bar {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.tab-btn {
    padding: 10px 20px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--text-secondary);
    font-size: 15px;
    cursor: pointer;
    transition: all 0.3s;
    margin-bottom: -2px;
}

.tab-btn:hover {
    color: var(--primary-color);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    font-weight: 500;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.page.active {
    display: block;
    animation: fadeIn 0.25s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.page-header {
    margin-bottom: 24px;
}

.page-header h2 {
    color: var(--md-on-surface);
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 4px;
    letter-spacing: -0.5px;
}

.page-subtitle {
    color: var(--md-on-surface-variant);
    font-size: 14px;
}

/* ===== MD3输入框样式 ===== */
.md-input, .md-select, .md-textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--md-radius-sm);
    font-size: 14px;
    background: var(--md-surface-container-lowest);
    color: var(--md-on-surface);
    transition: var(--md-transition);
    font-family: inherit;
}

.md-input:focus, .md-select:focus, .md-textarea:focus {
    outline: none;
    border-color: var(--md-primary);
    box-shadow: 0 0 0 1px var(--md-primary);
}

.md-input::placeholder {
    color: var(--md-outline);
}

.md-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23514347' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.md-textarea {
    resize: vertical;
    min-height: 100px;
}

.input-group {
    margin-bottom: 16px;
}

.form-row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
}

.form-row .md-select {
    min-width: 140px;
    width: auto;
}

/* ===== 搜索区域 ===== */
.search-bar {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.search-bar .md-input {
    flex: 1;
}

.search-section {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--md-outline-variant);
}

.search-section h3 {
    font-size: 18px;
    font-weight: 500;
    margin-bottom: 16px;
    color: var(--md-on-surface);
}

/* ===== 快速下载卡片 ===== */
.quick-download-card {
    background: var(--md-surface-container-lowest);
    border-radius: var(--md-radius-lg);
    padding: 24px;
    box-shadow: var(--md-elevation-1);
}

.quick-download-form .input-group {
    margin-bottom: 16px;
}

.quick-download-form .md-input {
    font-size: 16px;
    padding: 16px;
}

#parsed-book-info {
    margin-top: 20px;
}

#parsed-book-info .book-card {
    max-width: 100%;
    background: var(--md-surface-container);
}

/* ===== 书籍卡片 - MD3风格 ===== */
.book-list, .queue-list, .library-list, .shared-list, .search-results {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 16px;
}

.book-card {
    background: var(--md-surface-container-lowest);
    border-radius: var(--md-radius-lg);
    overflow: hidden;
    box-shadow: var(--md-elevation-1);
    transition: var(--md-transition);
    display: flex;
    flex-direction: column;
    padding: 10px;
}

.book-card:hover {
    box-shadow: var(--md-elevation-3);
    transform: translateY(-2px);
}

.book-card-body {
    display: flex;
    padding: 16px;
    gap: 16px;
}

.book-cover {
    width: 72px;
    height: 100px;
    object-fit: cover;
    border-radius: var(--md-radius-sm);
    flex-shrink: 0;
    background: var(--md-surface-container);
}

.book-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.book-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--md-on-surface);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.book-author {
    font-size: 13px;
    color: var(--md-on-surface-variant);
}

.book-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-top: 4px;
}

.book-tag {
    background: var(--md-surface-container-high);
    color: var(--md-on-surface-variant);
    padding: 2px 8px;
    border-radius: var(--md-radius-full);
    font-size: 11px;
}

.book-card-footer {
    padding: 12px 16px;
    background: var(--md-surface-container-low);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    border-top: 1px solid var(--md-outline-variant);
}

/* ===== 搜索结果版本样式 ===== */
.book-versions {
    margin-top: 12px;
    padding: 10px;
    background: var(--md-surface-container-low);
    border-radius: var(--md-radius-sm);
}

.versions-title {
    font-size: 12px;
    color: var(--md-on-surface-variant);
    margin-bottom: 8px;
    font-weight: 500;
}

.version-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
    border-bottom: 1px solid var(--md-outline-variant);
}

.version-item:last-child {
    border-bottom: none;
}

.version-info {
    display: flex;
    gap: 8px;
    align-items: center;
}

.chapter-count {
    font-weight: 600;
    color: var(--md-primary);
    font-size: 13px;
}

.total-chapters {
    font-size: 12px;
    color: var(--md-on-surface-variant);
}

.version-actions {
    display: flex;
    gap: 6px;
    align-items: center;
}

.no-shared {
    font-size: 11px;
    color: var(--md-outline);
    padding: 4px 8px;
    background: var(--md-surface-container);
    border-radius: var(--md-radius-full);
}

.btn-xs {
    padding: 4px 10px;
    font-size: 11px;
    border-radius: var(--md-radius-full);
}

/* ===== 队列项样式 - MD3 ===== */
.queue-item {
    background: var(--md-surface-container-lowest);
    border-radius: var(--md-radius-lg);
    padding: 20px;
    box-shadow: var(--md-elevation-1);
}

.queue-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.queue-item-title {
    font-weight: 600;
    font-size: 15px;
    color: var(--md-on-surface);
}

.queue-status {
    padding: 4px 12px;
    border-radius: var(--md-radius-full);
    font-size: 12px;
    font-weight: 500;
}

.queue-status.pending {
    background: #FFF3E0;
    color: #E65100;
}

.queue-status.downloading {
    background: #E3F2FD;
    color: #1565C0;
}

.queue-status.completed {
    background: #E8F5E9;
    color: #2E7D32;
}

.queue-status.failed {
    background: #FFEBEE;
    color: #C62828;
}

.queue-progress {
    height: 4px;
    background: var(--md-surface-container-highest);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 8px;
}

.queue-progress-bar {
    height: 100%;
    background: var(--md-primary);
    transition: width 0.3s ease;
    border-radius: 2px;
}

.queue-progress-text {
    font-size: 13px;
    color: var(--md-on-surface-variant);
}

.queue-progress-container {
    margin-top: 12px;
    padding: 12px;
    background: var(--md-surface-container);
    border-radius: var(--md-radius-sm);
}

/* ===== 共享书库 - MD3 ===== */
.share-notice {
    background: var(--md-surface-container-lowest);
    border-radius: var(--md-radius-lg);
    padding: 0;
    margin-bottom: 24px;
    display: flex;
    align-items: flex-start;
    gap: 20px;
    box-shadow: var(--md-elevation-1);
    overflow: hidden;
}

.notice-icon {
    font-size: 64px;
    padding: 24px;
    background: var(--md-primary-container);
    display: flex;
    align-items: center;
    justify-content: center;
}

.notice-content {
    padding: 24px 24px 24px 0;
    flex: 1;
}

.notice-content h3 {
    color: var(--md-on-surface);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

.notice-content ul {
    padding-left: 20px;
    margin-bottom: 16px;
}

.notice-content li {
    margin-bottom: 6px;
    color: var(--md-on-surface-variant);
    font-size: 14px;
}

.share-search {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.share-search .md-input {
    flex: 1;
}

/* ===== 弹窗 - MD3 ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--md-surface-container-lowest);
    border-radius: var(--md-radius-xl);
    width: 90%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalIn 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--md-elevation-3);
}

.modal-lg {
    max-width: 560px;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.modal-header {
    padding: 24px 24px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    color: var(--md-on-surface);
    font-size: 20px;
    font-weight: 600;
}

.modal-close {
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--md-on-surface-variant);
    cursor: pointer;
    border-radius: var(--md-radius-full);
    transition: var(--md-transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: var(--md-surface-container-high);
    color: var(--md-error);
}

.modal-body {
    padding: 0 24px 24px;
}

/* ===== 表单样式 - MD3 ===== */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 13px;
    color: var(--md-on-surface-variant);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--md-radius-sm);
    font-size: 14px;
    outline: none;
    transition: var(--md-transition);
    font-family: inherit;
    background: var(--md-surface-container-lowest);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--md-primary);
    box-shadow: 0 0 0 1px var(--md-primary);
}

.form-hint {
    display: block;
    margin-top: 4px;
    font-size: 12px;
    color: var(--md-on-surface-variant);
    opacity: 0.7;
}

.form-error {
    color: var(--md-error);
    font-size: 12px;
    margin-bottom: 12px;
    min-height: 18px;
}

/* ===== 设置页面 - MD3 ===== */
.settings-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--md-outline-variant);
}

.settings-tab {
    padding: 10px 20px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--md-on-surface-variant);
    border-radius: var(--md-radius-full);
    transition: var(--md-transition);
}

.settings-tab:hover {
    background: var(--md-surface-container);
    color: var(--md-on-surface);
}

.settings-tab.active {
    background: var(--md-secondary-container);
    color: var(--md-on-secondary-container);
}

.settings-content {
    display: none;
}

.settings-content.active {
    display: block;
}

.settings-content h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--md-on-surface);
}

.settings-desc {
    color: var(--md-on-surface-variant);
    font-size: 13px;
    margin-bottom: 20px;
    line-height: 1.5;
}

.cookie-status {
    background: var(--md-surface-container);
    padding: 12px 16px;
    border-radius: var(--md-radius-sm);
    margin: 12px 0;
    font-size: 13px;
}

.cookie-status.success {
    background: #E8F5E9;
    color: #2E7D32;
}

.cookie-status.error {
    background: #FFEBEE;
    color: #C62828;
}

.share-status {
    background: var(--md-surface-container);
    padding: 16px;
    border-radius: var(--md-radius-md);
}

.status-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
}

.status-item:not(:last-child) {
    border-bottom: 1px solid var(--md-outline-variant);
}

.status-label {
    color: var(--md-on-surface-variant);
    font-size: 13px;
}

.status-value {
    font-weight: 500;
    color: var(--md-primary);
}

/* ===== 空状态 ===== */
.empty-message {
    text-align: center;
    padding: 48px 24px;
    color: var(--md-outline);
    grid-column: 1 / -1;
    font-size: 14px;
}

/* ===== 登录提示 ===== */
.login-required {
    text-align: center;
    padding: 48px;
    background: var(--md-surface-container-lowest);
    border-radius: var(--md-radius-lg);
}

.login-required p {
    color: var(--md-on-surface-variant);
    margin-bottom: 16px;
}

/* ===== 认证切换 ===== */
.auth-switch {
    text-align: center;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--md-outline-variant);
    font-size: 14px;
    color: var(--md-on-surface-variant);
}

.auth-switch a {
    font-weight: 500;
    color: var(--md-primary);
}

/* ===== Toast消息 - MD3 ===== */
.toast-container {
    position: fixed;
    top: 72px;
    right: 24px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 14px 20px;
    background: var(--md-on-surface);
    color: var(--md-surface);
    border-radius: var(--md-radius-sm);
    box-shadow: var(--md-elevation-3);
    animation: toastIn 0.25s ease-out, toastOut 0.25s ease-in 2.5s forwards;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    max-width: 360px;
}

.toast.success {
    background: #1B5E20;
}

.toast.error {
    background: var(--md-error);
}

.toast.warning {
    background: #E65100;
}

.toast.info {
    background: #1565C0;
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes toastOut {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

/* ===== 底部 - MD3 ===== */
.footer {
    text-align: center;
    padding: 20px;
    color: var(--md-outline);
    background: var(--md-surface-container-low);
    font-size: 13px;
}

/* ===== 响应式适配 - 移动端优化 ===== */

/* 平板设备 */
@media (max-width: 900px) {
    .header {
        flex-wrap: wrap;
        gap: 12px;
        padding: 10px 16px;
    }
    
    .logo-text {
        font-size: 16px;
    }
    
    .nav {
        order: 3;
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
        gap: 6px;
    }
    
    .nav-link {
        padding: 7px 10px;
        font-size: 12px;
    }
    
    .user-area, .user-info {
        flex-wrap: wrap;
        gap: 6px;
    }
    
    .btn-sm {
        padding: 5px 12px;
        font-size: 12px;
    }
    
    .book-list, .queue-list, .library-list, .shared-list, .search-results {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 12px;
    }
    
    .main-content {
        padding: 16px;
    }
    
    .page-header h2 {
        font-size: 24px;
    }
}

/* 手机横屏/小平板 */
@media (max-width: 768px) {
    body {
        font-size: 13px;
    }
    
    .header {
        padding: 8px 12px;
    }
    
    .logo {
        gap: 8px;
    }
    
    .logo-icon {
        font-size: 20px;
    }
    
    .logo-text {
        font-size: 15px;
    }
    
    .nav {
        order: 3;
        width: 100%;
        justify-content: center;
        gap: 4px;
    }
    
    .nav-link {
        padding: 6px 10px;
        font-size: 12px;
    }
    
    .user-area, .user-info {
        gap: 6px;
    }
    
    #username-display {
        font-size: 12px;
        padding: 4px 10px;
    }
    
    .btn {
        padding: 8px 16px;
        font-size: 13px;
    }
    
    .btn-sm {
        padding: 4px 10px;
        font-size: 11px;
    }
    
    .main-content {
        padding: 12px;
    }
    
    .page-header h2 {
        font-size: 22px;
    }
    
    .page-subtitle {
        font-size: 13px;
    }
    
    .unified-search-card {
        padding: 16px;
    }
    
    .unified-search-form {
        flex-wrap: wrap;
    }
    
    .unified-search-form .input-group {
        width: 100%;
        min-width: 100%;
    }
    
    .unified-search-form .button-group {
        width: 100%;
        flex-wrap: wrap;
    }
    
    .unified-search-form .md-select,
    .unified-search-form .btn {
        flex: 1;
        min-width: calc(50% - 4px);
    }
    
    .book-list, .queue-list, .library-list, .shared-list, .search-results {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .book-card {
        padding: 10px;
    }
    
    .book-card-body {
        padding: 12px;
        gap: 12px;
    }
    
    .book-cover {
        width: 60px;
        height: 84px;
    }
    
    .book-title {
        font-size: 14px;
    }
    
    .book-author {
        font-size: 12px;
    }
    
    .book-tag {
        font-size: 10px;
        padding: 2px 6px;
    }
    
    .book-card-footer {
        padding: 10px 12px;
        gap: 6px;
    }
    
    .filter-bar {
        flex-direction: column;
        gap: 10px;
        padding: 12px;
    }
    
    .filter-bar .md-select {
        width: 100%;
    }
    
    .modal {
        width: 95%;
        max-height: 90vh;
    }
    
    .modal-header {
        padding: 20px 20px 16px;
    }
    
    .modal-header h3 {
        font-size: 18px;
    }
    
    .modal-body {
        padding: 0 20px 20px;
    }
    
    .notice-icon {
        font-size: 48px;
        padding: 20px;
    }
    
    .notice-content {
        padding: 20px 20px 20px 0;
    }
    
    .notice-content h3 {
        font-size: 16px;
    }
    
    .toast-container {
        right: 16px;
        top: 60px;
    }
    
    .toast {
        max-width: 320px;
        font-size: 13px;
    }
}

/* 手机竖屏 */
@media (max-width: 600px) {
    .header {
        padding: 6px 10px;
    }
    
    .logo {
        gap: 6px;
    }
    
    .logo-icon {
        font-size: 18px;
    }
    
    .logo-text {
        font-size: 14px;
    }
    
    .user-info {
        font-size: 11px;
    }
    
    #username-display {
        font-size: 11px;
        padding: 4px 8px;
    }
    
    .nav {
        order: 3;
        width: 100%;
        justify-content: flex-start;
        gap: 4px;
    }
    
    .nav-link {
        padding: 6px 8px;
        font-size: 11px;
    }
    
    .btn {
        padding: 7px 14px;
        font-size: 12px;
    }
    
    .btn-sm {
        padding: 4px 8px;
        font-size: 10px;
    }
    
    .main-content {
        padding: 10px;
    }
    
    .page-header h2 {
        font-size: 20px;
    }
    
    .page-subtitle {
        font-size: 12px;
    }
    
    .unified-search-card {
        padding: 12px;
    }
    
    .unified-search-form .input-group .md-input {
        height: 44px;
        font-size: 14px;
    }
    
    .unified-search-form .md-select {
        height: 44px;
        font-size: 13px;
    }
    
    .unified-search-form .btn {
        height: 44px;
        font-size: 13px;
        width: 100%;
    }
    
    .book-list, .queue-list, .library-list, .shared-list, .search-results {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
    
    .book-card {
        padding: 8px;
    }
    
    .book-card-body {
        padding: 10px;
        gap: 10px;
    }
    
    .book-cover {
        width: 54px;
        height: 75px;
    }
    
    .book-title {
        font-size: 13px;
    }
    
    .book-author {
        font-size: 11px;
    }
    
    .book-tag {
        font-size: 9px;
    }
    
    .book-card-footer {
        padding: 8px 10px;
    }
    
    .modal {
        width: 95%;
        margin: 10px;
        max-height: 92vh;
    }
    
    .modal-header {
        padding: 16px;
    }
    
    .modal-header h3 {
        font-size: 16px;
    }
    
    .modal-body {
        padding: 0 16px 16px;
    }
    
    .notice-icon {
        font-size: 40px;
        padding: 16px;
    }
    
    .notice-content {
        padding: 16px 16px 16px 0;
    }
    
    .notice-content h3 {
        font-size: 15px;
    }
    
    .notice-content li {
        font-size: 13px;
    }
    
    .settings-tab {
        padding: 8px 14px;
        font-size: 13px;
    }
    
    .form-group label {
        font-size: 12px;
    }
    
    .form-group input,
    .form-group textarea,
    .form-group select {
        padding: 12px 14px;
        font-size: 13px;
    }
}

/* 小屏手机 */
@media (max-width: 480px) {
    .header {
        padding: 6px 8px;
    }
    
    .logo-icon {
        font-size: 16px;
    }
    
    .logo-text {
        font-size: 13px;
    }
    
    .nav-link {
        padding: 5px 6px;
        font-size: 10px;
    }
    
    .user-area .btn,
    .user-info .btn {
        padding: 6px 10px;
        font-size: 11px;
    }
    
    .unified-search-card {
        padding: 12px;
    }
    
    .unified-search-form .button-group {
        flex-direction: column;
        gap: 8px;
    }
    
    .unified-search-form .md-select,
    .unified-search-form .btn {
        width: 100%;
        min-width: 100%;
    }
    
    .book-list, .queue-list, .library-list, .shared-list, .search-results {
        grid-template-columns: repeat(2, 1fr);
        gap: 6px;
    }
    
    .book-card {
        padding: 6px;
    }
    
    .book-card-body {
        padding: 8px;
        gap: 8px;
    }
    
    .book-cover {
        width: 48px;
        height: 67px;
    }
    
    .book-title {
        font-size: 12px;
    }
    
    .book-author {
        font-size: 10px;
    }
    
    .book-tag {
        font-size: 8px;
        padding: 1px 4px;
    }
    
    .notice-content {
        flex-direction: column;
    }
    
    .notice-icon {
        padding: 12px;
        font-size: 32px;
    }
    
    .rankings-tabs {
        padding: 6px;
    }
    
    .ranking-tab {
        font-size: 11px;
        padding: 6px 10px;
    }
}

/* ===== 快速下载区域 ===== */
.quick-download-section {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 20px;
    margin: 20px 0;
    border: 1px solid var(--border-color);
}

.quick-download-section h3 {
    margin-bottom: 15px;
    color: var(--primary-dark);
    font-size: 16px;
}

.quick-download-form {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
}

.quick-download-form input[type="text"] {
    flex: 1;
    min-width: 300px;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    transition: var(--transition);
}

.quick-download-form input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--shadow-color);
}

.quick-download-form select {
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    background: white;
    cursor: pointer;
}

#parsed-book-info {
    margin-top: 15px;
}

#parsed-book-info .book-card {
    max-width: 500px;
}

/* ===== 下载记录列表样式 ===== */
.history-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.history-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: var(--md-surface-container-lowest);
    border-radius: var(--md-radius-md);
    transition: var(--md-transition);
}

.history-item:hover {
    background: var(--md-surface-container);
}

.history-info {
    flex: 1;
    min-width: 0;
}

.history-title {
    font-weight: 500;
    color: var(--md-on-surface);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.history-meta {
    display: flex;
    gap: 16px;
    margin-top: 4px;
    font-size: 12px;
    color: var(--md-on-surface-variant);
}

.history-time {
    font-size: 12px;
    color: var(--md-outline);
    white-space: nowrap;
}

/* ===== 共享书籍信息 ===== */
.book-share-info {
    display: flex;
    gap: 12px;
    margin-top: 6px;
    font-size: 11px;
    color: var(--md-outline);
}

.book-share-info .uploader {
    color: var(--md-primary);
}

.book-share-info .download-count {
    color: var(--md-success);
    font-weight: 500;
}

/* 共享书库卡片边框 */
.shared-list .book-card {
    position: relative;
    border-left: 3px solid var(--md-primary);
}

@media (max-width: 768px) {
    .quick-download-form {
        flex-direction: column;
    }
    
    .quick-download-form input[type="text"] {
        min-width: 100%;
    }
    
    .quick-download-form select,
    .quick-download-form .btn {
        width: 100%;
    }
}

/* ===== 筛选器样式 - MD3 ===== */
.filter-bar {
    display: flex;
    gap: 12px;
    padding: 12px 16px;
    background: var(--md-surface-container-low);
    border-radius: var(--md-radius-lg);
    margin-bottom: 20px;
    flex-wrap: wrap;
    align-items: center;
}

.filter-bar .md-select {
    min-width: 120px;
    width: auto;
    padding: 10px 36px 10px 12px;
    background: var(--md-surface-container-lowest);
}

/* ===== 统一搜索栏样式 ===== */
.unified-search-card {
    background: linear-gradient(135deg, var(--md-surface-container-lowest) 0%, var(--md-surface-container-low) 100%);
    padding: 24px;
    border-radius: var(--md-radius-lg);
    box-shadow: var(--md-elevation-2);
    margin-bottom: 24px;
    border: 1px solid var(--md-outline-variant);
}

.unified-search-form {
    display: flex;
    gap: 12px;
    align-items: stretch;
    flex-wrap: nowrap;
}

.unified-search-form .input-group {
    flex: 1;
    min-width: 300px;
    display: flex;
    align-items: center;
}

.unified-search-form .input-group .md-input {
    height: 48px;
    font-size: 15px;
    border: 2px solid var(--md-outline-variant);
    transition: all var(--md-transition);
}

.unified-search-form .input-group .md-input:focus {
    border-color: var(--md-primary);
    box-shadow: 0 0 0 3px rgba(216, 27, 96, 0.1);
}

.unified-search-form .button-group {
    display: flex;
    gap: 8px;
    align-items: stretch;
}

.unified-search-form .md-select {
    min-width: 110px;
    height: 48px;
    font-size: 14px;
    font-weight: 500;
    border: 2px solid var(--md-outline-variant);
    background: var(--md-surface-container-lowest);
    transition: all var(--md-transition);
}

.unified-search-form .md-select:hover {
    border-color: var(--md-outline);
    background: var(--md-surface-container);
}

.unified-search-form .md-select:focus {
    border-color: var(--md-primary);
    outline: none;
}

.unified-search-form .btn {
    height: 48px;
    padding: 0 20px;
    font-size: 14px;
    font-weight: 600;
    min-width: 80px;
    border-radius: var(--md-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all var(--md-transition);
    box-shadow: var(--md-elevation-1);
}

.unified-search-form .btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--md-elevation-2);
}

.unified-search-form .btn:active {
    transform: translateY(0);
    box-shadow: var(--md-elevation-1);
}

.unified-search-form .btn-outline {
    background: var(--md-surface-container-lowest);
    color: var(--md-primary);
    border: 2px solid var(--md-primary);
}

.unified-search-form .btn-outline:hover {
    background: var(--md-primary-container);
}

.unified-search-form .btn-primary {
    background: var(--md-primary);
    color: var(--md-on-primary);
    border: 2px solid var(--md-primary);
}

.unified-search-form .btn-primary:hover {
    background: #C2185B;
    border-color: #C2185B;
}

.unified-search-form .btn-tonal {
    background: var(--md-secondary-container);
    color: var(--md-on-secondary-container);
    border: 2px solid transparent;
}

.unified-search-form .btn-tonal:hover {
    background: #EAC9CE;
    box-shadow: var(--md-elevation-2);
}

@media (max-width: 968px) {
    .unified-search-form {
        flex-wrap: wrap;
    }
    
    .unified-search-form .input-group {
        width: 100%;
        min-width: 100%;
    }
    
    .unified-search-form .button-group {
        width: 100%;
        flex-wrap: wrap;
    }
    
    .unified-search-form .md-select,
    .unified-search-form .btn {
        flex: 1;
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .unified-search-card {
        padding: 16px;
    }
    
    .unified-search-form .button-group {
        flex-direction: column;
        gap: 8px;
    }
    
    .unified-search-form .btn {
        width: 100%;
    }
}

@media (max-width: 768px) {
    .filter-bar {
        flex-direction: column;
        gap: 10px;
    }
    
    .filter-select {
        width: 100%;
    }
}

/* ===== 设置页样式 ===== */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    user-select: none;
    padding: 12px 0;
}

.md-checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--md-primary);
}

.checkbox-label span {
    font-size: 15px;
    color: var(--md-on-surface);
}

.checkbox-label:hover span {
    color: var(--md-primary);
}

.share-status {
    background: var(--md-surface-container-low);
    padding: 16px;
    border-radius: var(--md-radius-md);
    border: 1px solid var(--md-outline-variant);
}

.status-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--md-outline-variant);
}

.status-item:last-child {
    border-bottom: none;
}

.status-label {
    font-size: 14px;
    color: var(--md-on-surface-variant);
    font-weight: 500;
}

.status-value {
    font-size: 14px;
    color: var(--md-on-surface);
    font-weight: 600;
}

.settings-desc {
    color: var(--md-on-surface-variant);
    font-size: 13px;
    margin-bottom: 16px;
    line-height: 1.6;
}

/* ===== 排行榜样式 ===== */
.rankings-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.ranking-tab {
    padding: 10px 20px;
    border: 1px solid var(--md-outline-variant);
    background: var(--md-surface-container-lowest);
    border-radius: var(--md-radius-full);
    color: var(--md-on-surface-variant);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.ranking-tab:hover {
    background: var(--md-surface-container);
}

.ranking-tab.active {
    background: var(--md-primary);
    color: var(--md-on-primary);
    border-color: var(--md-primary);
}

.ranking-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.ranking-item {
    background: var(--md-surface-container-lowest);
    border-radius: var(--md-radius-md);
    padding: 16px;
    display: flex;
    gap: 16px;
    align-items: center;
    transition: var(--md-transition);
    cursor: pointer;
}

.ranking-item:hover {
    box-shadow: var(--md-elevation-2);
    transform: translateY(-1px);
}

.ranking-number {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
    color: var(--md-on-surface-variant);
    border-radius: var(--md-radius-sm);
    flex-shrink: 0;
}

.ranking-number.top1 {
    background: linear-gradient(135deg, #FFD700, #FFA500);
    color: white;
}

.ranking-number.top2 {
    background: linear-gradient(135deg, #C0C0C0, #A0A0A0);
    color: white;
}

.ranking-number.top3 {
    background: linear-gradient(135deg, #CD7F32, #A0522D);
    color: white;
}

.ranking-cover {
    width: 60px;
    height: 84px;
    object-fit: cover;
    border-radius: var(--md-radius-sm);
    flex-shrink: 0;
    background: var(--md-surface-container);
    cursor: pointer;
}

.ranking-cover:hover {
    box-shadow: var(--md-elevation-3);
}

.ranking-info {
    flex: 1;
    min-width: 0;
}

.ranking-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--md-on-surface);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-bottom: 4px;
    cursor: pointer;
}

.ranking-title:hover {
    color: var(--md-primary);
}

.ranking-author {
    font-size: 13px;
    color: var(--md-on-surface-variant);
    margin-bottom: 6px;
}

.ranking-meta {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    font-size: 12px;
    color: var(--md-outline);
}

.ranking-stats {
    text-align: right;
    flex-shrink: 0;
}

.ranking-value {
    font-size: 22px;
    font-weight: 700;
    color: var(--md-primary);
    margin-bottom: 2px;
}

.ranking-label {
    font-size: 11px;
    color: var(--md-on-surface-variant);
}